Put a fine mesh strainer over the mouth of your glass container. 

Pour the grease through the strainer.

Cover the glass jar or container.

Slide the jar or container into your refrigerator.

If freezing the container, make sure there is at least half an inch of room at the top for space for the grease to expand. 

Bacon grease can be thawed and used up to a year in the freezer.

Wipe the strainer with a used napkin or paper towel before washing to help keep grease out of your pipes.